32103: SIP: Empty body

Twilio returns this warning when it receives a SIP request with an empty message body in a context where that request must include one. In Twilio SIP flows, endpoints send requests such as REGISTER and INVITE, and call setup can depend on SDP carried in the SIP message body.

• Your SIP client, PBX, SBC, or application sent a SIP request with an empty body.
• If this warning occurred during call setup, the INVITE may have been sent without an SDP offer for media negotiation.

• Update your SIP client or SIP infrastructure to send a non-empty body for the request type you are using. If this happens on an INVITE, include a valid SDP offer.
• If you are sending SIP to a Twilio SIP Domain or registering an endpoint, verify that your endpoint is sending standard SIP requests with the information Twilio expects for that flow.
• Review your SIP call logs and packet captures to confirm the body is present before Twilio receives the request.

• Use SIP with Twilio Voice
• Inbound - Sending SIP to Twilio
• Troubleshooting your Trunk
• Troubleshooting Twilio Elastic SIP Trunking and SIP Domain Calls